<p>
    Runs a shell command of your choice to install the tool. Ubuntu example,
    assuming the Hudson user is in <code>/etc/sudoers</code>:
</p>
<pre>sudo apt-get --yes install openjdk-6-jdk</pre>
<p>
    (In this case specify <code>/usr/lib/jvm/java-6-openjdk</code> as the home directory.)
</p>
<p>
    As another example, to install Sun JDK 6 for (x86) Linux,
    you can use <a href="https://jdk-distros.java.net/developer.html">DLJ</a>:
</p>
<pre>bin=jdk-6u13-dlj-linux-i586.bin
if [ \! -f $bin ]
then
    wget --no-verbose http://download.java.net/dlj/binaries/$bin
    sh $bin --unpack --accept-license
fi</pre>
<p>
    (In this case specify <code>jdk1.6.0_13</code> as the home directory.)
</p>
